Problem with hl-engine-js is that the `init()` method simply takes "location", a url to a directory
containing all the engine files.

https://github.com/steren/hl-engine-js/blob/main/lib/hl-engine.js#L145
- loadXash would need to be changed
- `Module.memoryInitializerPrefixURL = params.location + "/";` is where all the emscripten-specific
  files are loaded. This can be replaced with [Module.locateFile](https://emscripten.org/docs/api_reference/module.html#Module.locateFile)

### Cool ideas

https://github.com/leonill007/vgui.css